[Chicken-users] Segfaults with shared library, foreign code

[Evan Hanson]

I'm trying to write bindings to the Clutter UI toolkit, but I'm
hitting segfaults when building a shared library. I've essentialized
the issue to the following code:

http://gist.github.com/847871#file_clutter.scm

The C is more or less copied & pasted from the Clutter docs, and it
compiles correctly both alone with gcc and in the above file with:

    $ csc clutter.scm -C "`pkg-config --cflags clutter-1.0`" -L
"`pkg-config --libs clutter-1.0`"
    $ ./clutter
    [window opens, everything's good]

But when I remove the invocation of (main) or wrap it in a module and
try to build it as a shared library (with -s) it compiles fine but
segfaults when loaded at an interpreter or in another .scm file:

    $ csc -s clutter.scm -C "`pkg-config --cflags clutter-1.0`" -L
"`pkg-config --libs clutter-1.0`"
    $ csi clutter.so
    [...]
    #;1> (main)
    Segmentation fault

Likewise, the following file using lazy-ffi has the same problem:
http://gist.github.com/847871#file_clutter_lazy.scm

FWIW it seems that removing any reference to clutter_text solves the
problem, which might point to Clutter as the troublemaker, BUT both
files above work perfectly on OS X with the same versions of both
Chicken and Clutter, so I'm not sure. Also, removing the entrance of
clutter_main (the GUI loop) doesn't help. I might just be missing some
compilation flags but I'm pretty much in the dark.

Any ideas?

Evan